Making a transfer tail



- Oct-14, 1958 J. 'r. RICH 2,355,747

MAKING A TRANSFER TAIL Filed Aug. 20. 1953 2 SheetS -Sheet 1 Pig. 1.

Fig. 2.

INVEN TOR.

John T. Rich "Y 77 Z2 A TTORNE Y Oct. 14, 1958 J. T. RICH 2,855,747

MAKING A TRANSFER TAIL Filed Aug. 20. 1953 2 Sheets-Sheet 2 Fig.3. q 23Fig.4.

IN VEN TOR.

ohn T. Rich A TTORNE Y aim U.

2,355,741 A- TR. 51 131 23.:T ML.

' 5 John T. Rich,- Morristown, Tenn as s ignor. to Americgn; Erka-Corporation, Enka, Ni'C; a corporatiomof D ela ware.

Appli a on Au yst2 n195 1. ialN dfisfWL.

7 'Claims; or; 57 -34 This invention relates; to; thread collection;and; more particularly to the ;collection of a; continuously ,runninghre d n w n a ne,

With theadvent of continuous spinning, 1, numerous; problemshavepresentedthemselves; in connection, with; thecollection-ofi the;continuously issuing threads. The; take-up used in-such aprocess must-beprovided. with-1a; means for disp-osingof the running threadsduring;the;;, dofiing operation. Whendesirable; such a;take-up,must'salso be provided. with ameans for producing asrnagazinei wrap ortransfertail on the bobbins 1 used;;to. collect the; thread.

It hashereto-fore been proposed to utilize, on a-thread take-up for acontinuous-process, a; bobbimcharacterizedxt by having oneslitted flangebetweenthe ends ,-.of thGtCQI'CiT on which thethread is,.wound.1 The,tail onendzof-the thread is then maintained wholly-outside ofrthethreadgg package. For. example,v see 1 U. 8;... Patent 2-;43.1,323.MWhile theuse of such a specially constructed tbobbinihase been. found,:to :have certain; advantages,=1 itz-hassbeen robe. served that theloose. endof the.transfer;tailrtendsntot be swung outwardly bycentrifugal force duringithe winds; ingoperation and. become damaged1or.-dirty.:' Also, the length of transfer, tails-produced in suchanoperation varies considerably from -one.bobbin to.another andrthisssis undesirable.

It :is an object of the-.present'invention .toprovide' an. methodandapparatus for dofiing a twistingmachine:

Another object of the invention is toprovide-a method: and apparatusfor, producing 'a-transfere-tail. Ion -.a bobbin-- used to collectthread 1 produced in a: continuous. manner.

A: furtherobject .offithelinventionis to.=providet-. a. method andapparatus for:producing transfer tails of o substantially uniform lengthon theabobbinslused for collecting continuously produced threads.-v

Other objects will appear .fromthe -following"des criptions' when: takenin l conjunction with the. annexd draw ings wherein:

Figure 1 .is t a schematic perspectiveof -a-singlesposition on-aring.twisting.machinegnodified' in-accordaneewith; a 1preferredfembodiment of the :present invention; I

Figure -2iis a schematic perspective similautoFigu-re l'ish'owingabobbin in'tplace onthe twister spindleg Figure/:3 iswa sectionalv viewtakenalong the centralaxis of the-bobbin used; in the :presentinvention;

Figure 4is-a perspective viewof- 'a special tail con-- fining sleeveused iin-:the.presentinvention;-

Figure 5 is a plan view of a special thread cutter use in the presentginventiom'and Figure 6 is aviewli partelevation ,of -thg Cutter shownin Figure 5.

In accordance with the present-invention, a tailg con; fining sleeve isattached tothe ring twiste r oonc'e. ally surrounding the spindleatthebaseofjthe bob'b An extensiongon the bottom-of the bobbin which cont ns;the transfer tailifits insidethis sleeve. In this manner the transfertaiFis; maint-ainedwithin the sleeve in a clean andgundamaged conditionas the' twisting operation pro; ceeds. Bythe use of'apneumatic'collection device and a special thread cutter in combinationwith the tail con- ICC finingsleeve; clean undamaged transfer tails ofsubstantially uniform length are produced.

Referring now to Figures 1 and 2, a continuously running thread10'passes through guide 11 mounted over spindle;1210n a ring twister.Spindle 12 is driven by suitable means (not shown). During the dofiingoperation, as shown in Figure 1, the thread 10 is takenup by means of apneumatic thread-suction collection device schematically illustrated at13. Collection device-13 may be ofany suitable design, such as the onedescribed in Application Serial No. 237,526, filed July 19, 1951 now- U.S. Patent No. 2,661,588; Disposed in the thread pathbetween collectiondevice 13 and-spind1e'12 is a thread;

cutter schematically indicated 'at14.'

Cutter 14, the details of which are shownmore clearly inFigures 5 and'6, comprises an- L-shaped supporting member 15havingmounted thereon -athin resilient metal cutting blade 16. The cutting edge of the blade 16is indicatedat 19; Cutting 'blade-16'is held in placeby screw 17 whichpasses through a slot in blade 16 to the ,wall of supporting member 15.As shown by dotted lines in Figure 6, a portion of the supportingrnember15 is cut away to provide an-opening through whichthe thread can pass-tothe cutting edge 19."

It will be seen from Figure 5' that the cutting edge 19 normallyliesbarely in contact with shoulder l 8jjof' supporting member lst With athread running through the devic'e from the top of the drawing towardthe bottom ofthe'drawing in Figure 5; blade 16," which is movableat-its-' unsupported end, tends away from shoulderlSf. and-the passageof the thread; through the ,device isnot hindered; Howevenif thedirection of'threadtravel is reverscdand the thread begins totravel'through the. device from-the bottom of the drawing to the topofthe drawing in Figure 5, cutting edge 19 is immediately drawn by-thefriction of the running thread into contact with shoulder l8 and thethread is severed at once. Thus itis seen that in the arrangement shownin Figure l'the cutter l4 permits thread 10 to continue:to pass to.collection device 13 but as soon as an, attempt is made to reverse thedirection of thread travel and withdraw the thread 10*from thecollection device13 toward the twister spindle -12 the thread issevered. The cutter 14 per se is.

- notpart of the present invention; such. adevice is well" known in thetextile industry and maybe commercially obtained.

As seen more clearly in Figure 3, the bobbin usedfin thepresentinventi-oncomprises a central hollow core portion 20; a lowerflange 2liand an,upper fiangeZZ,

At the top of the bobbin is a grippingkn-ob 23. As ,seen in Figure 2,lowerfiange 21 contains .a slot 24whichj extends from the periphery ofthe flange to core. portion 20 of the bobbin.

The under side of flange 21 is provided with a relatively thick'rirn 22.concentrically disposed on thetunder side of lower flange 21 is hubportion 26. Hub portion 26 contains a shallow. groove 25.ar-ound'itsperiphery adapted *to carry a transfer tail.

Referring now to Figure 4, there is, shown, cylindrical metal sleevemember 30.. Extending frornthetop of twisting; machine.

It will be apparent that when vsleeve-fitlis mounted,

around twister spindle 12 in the position shown, in Figure ,1, the lowerportion. of .the spindle 12 Will beco ne centrically envelopedby thesleeve 30. More. specifi-, cally; the major portion of hub portion 26 ofthe bobbin will be enveloped by sleeve 30 when the bobbin is in PatentedOct.- 14, 1958 1 'then removed as shown in Figure 1.

is disposed slightly beneath the lowest part of slot 31 to hold therunning thread in the slot. 7

When the bobbin is placed on the spindle 12 as shown in Figure 2, theupper portion of sleeve 30 extends up.

into the annular recess formed between rim portion 22 and hub portion 26of the bobbin flange 21. With the bobbin in place on the spindle, thelowest part of the slot 31 is disposed opposite the groove 25 on hubportion 26.

In this manner the groove 25 adapted to contain the transfer tail isclosely surrounded by sleeve 30 and the' transfer tail is accordinglyconfined to a small area and maintained clean and undamaged. If ithappens that the tail escapes the confining sleeve 30 it willnevertheless be contained to a certain extent by the rim 22 on the lowerside of flange 21.

Bearing in mind the foregoing description of the various parts of thepresent apparatus, an explanation will now be given of a typical doffingoperation. When a bobbin has been filled and is ready to be doifed, thespindle is stopped, the running thread is severed and taken immediatelyto temporary collecting device 13. The thread may then be placed incutter 14. The filled bobbin is During this time the running threadcontinues to be collected by collection device 13. If it should becomenecessary to thread the running thread through the ring again theprocedure set forth in U. S. Patent 2,572,138 may be used.

In order to build a transfer tail and start the thread on an emptybobbin the following procedure is followed. The thread running to thetemporary collecting device 13 is threaded through the traveler 36. Withthe thread running in this position a fresh bobbin is placed on thespindle and the running thread is slipped into the slot 24 in the bottomflange of the bobbin. The bobbin is then rotated slightly manually so asto cause the slot 24 to pass back and forth over. the slot 31 in sleeve30. This results in the thread being caught in slot 31. The path ofthread travel at this stage of the operation is as follows: throughpigtail 11, traveler 36, slot 24, slot 31, cutter 14, to collectingdevice 13.

Rotation of the spindle 12 is then commenced. When this occurs, twothings happen: (1) the oncoming thread immediately starts to build up onthe core portion 20 of .the bobbin, and (2) the thread is severed by thecutter 14. As the spindle continues to rotate, the loose end iswithdrawn from the cutter 14 through the slot 31 in sleeve 30 into theinterior of the sleeve 30 where it is wound onto groove 25 to form thetransfer tail.

By suitably arranging the cutter 14 so that it is always spaced the samedistance from spindle 12, transfer tails of uniform length will beproduced on all bobbins. Each spindle on the twisting machine may beprovided with a cutter-collection device assembly or optionally one suchassembly may be used to service a number .of spindles by moving theassembly from one spindle to another as the dofling operation proceeds.

It is to be understood that various modifications might be made in theforegoing description without departing from the spirit of my invention.

What is claimed is:

1. In a ring twister for winding yarn on a flanged bobbin a barrel ofwhich has an extension thereon the combination of a spindle, acylindrical sleeve disposed coaxially around the base of said spindleand adapted to surround a tail-containing portion of said extension,said sleeve having a slit in the wall thereof and means capable ofexerting a yarn drawing action in a horizontal plane not higher thansaid slit.

2. In a ring spinning device for winding continuously produced yarn on aflanged bobbin the barrel of which has an extension thereon thecombination of a spindle,

a cylindrical sleeve disposed coaxially around the base of said spindleand adapted to surround a tail-containing portion of said extension,said sleeve having a slit in the wall thereof, a temporary collectiondevice capable of exerting a drawing action in a horizontal plane nothigher than said slit and a thread cutter in the thread path betweensaid slit and said temporary collection device.

3. In a ring spinning device for winding continuously produced yarn on aflanged bobbin the barrel of which has 'anextension thereon thecombination of a spindle, a cylindrical sleeve mounted coaxially aroundthe base of said spindle and adapted to surround a tail-containingportion of said extension, said sleeve having a slit in the wallthereof, a temporary collection device capable of exerting a drawingaction in a horizontal plane not higher than said slit and a threadcutter in the thread path between said slit and said temporarycollection device.

4. In a ring spinning device for winding continuously produced yarn on aflanged bobbin the barrel of which has an extension thereon thecombination of a spindle, a cylindrical sleeve mounted coaxially aroundthe base of said spindle and adapted to surround a tail-containingportion of said extension, said sleeve having an angular slit inthe wallthereof, a temporary collection device capable of exerting a drawingaction in a horizontal plane beneath said slit and a thread cutter inthe thread path between said slit and said temporary collection device.

5. In a ring spinning device for winding continuously produced yarn on aflanged bobbin the barrel of which has an extension thereon thecombination of a spindle, a cylindrical sleeve mounted coaxially aroundthe base of said spindle and adapted to surround a tail-containingportion of said extension, said sleeve having an angular slit in aportion of the wall thereof, a temporary collection device capable ofexerting a drawing action in a horizontal plane not higher than saidslit and a thread cutter in the thread path between said slit and saidtemporary collection device.

6. In a ring spinning device for winding continuously produced yarn on aflanged bobbin the barrel of which has an extension thereon thecombination of a spindle, a cylindrical sleeve mounted coaxially aroundthe base of said spindle and adapted to surround a tail-containingportion of said extension, said sleeve having an angular slit in aportion of the wall thereof, a temporary pneumatic collection devicecapable of exerting a drawing action in a horizontal plane not higherthan said slit and a thread cutter in the thread path between said slitand said temporary collection device.

7. In a ring spinning device for winding continuously produced yarn on aflanged bobbin the barrel of which has anextension thereon thecombination of a spindle, a cylindrical sleeve mounted coaxially aroundthe base of said spindle and adapted to surround a tail-containingportion of said extension, said sleeve having an angular slit in aportion of the upper wall, a temporary pneumatic collection devicecapable of exerting a drawing action in a horizontal plane beneath saidslit and a thread cutter in the thread path between said slit and saidtemporary collection device, said thread cutter being so constructedthat the thread is instantaneously severed when an attempt is made towithdraw the running thread from the temporary collection device towardsaid slit.

References Cited in the file of this patent UNITED STATES PATENTS1,976,332 Curtis Oct. 9, 1934 2,125,168 Leclercq July 26, 1938 2,261,239Elvin et al. Nov. 4, 1941 2,428,081 Keight et al. Sept. 30, 19472,431,323 Graybeal Nov. 25, 1947 2,542,106 Ayala Feb. 20, 1951 2,572,138Griset Oct. 23, 1951 2581.012 Garnett Jan. 1, 1952

